Satellite Missions

Test of spatio-temporal fusion of Sentinel-2 New Generation data with a potential VHR mission

Three years ago, we started the phase-0 study of a mission named Sentinel-HR : S-HR would be a satellite mission to complement Sentinel-2 new generation (S2-NG) with In that study, one of our assumptions was that a lower revisit frequency than that of Sentinel-2 was sufficient. This seems possible because, in most cases, the high frequency […]

28.09.2023

Iota2 ne fait pas que de la classification, elle produit aussi des indicateurs environnementaux !

Contexte scientifique Le projet SOCCROP, qui a été financé par l’association Planet A, avait pour objectif de développer un indicateur pour quantifier les échanges annuels de CO2 entre les parcelles cultivées et l’atmosphère. Mesurer les flux permet d’accéder à l’évolution des stocks de carbone des sols agricoles. Cet indicateur peut être utile dans différents contextes […]

13.09.2023

The rabbit of Alice in Wonderland is late, showing a big clock

[MUSCATE & THEIA] Production of Sentinel-2 L2A is late

Update on 25 september 2023 : we have no backlog left in Europe, and the system is catching up on the other regions of the world Update on 9 september 2023 : 25 days processed in a week over France ! We are catching up a bit CNES has bought and built a new HPC […]

05.09.2023

HR TIR DA IRL (High Resolution Thermal Infra-Red Directional Anisotropy In Real Life)

 => Dans le cadre de la préparation de la mission Trishna, une question importante concerne la nécessité de corriger les effets directionnels dans les images, ainsi que la méthode à appliquer. Certains d’entre vous sont sans doute familiers de l’effet dit de « hotspot » dans le domaine réflectif, qui a été bien illustré sur notre blog. […]

01.09.2023

An update on the use of CAMS 48r1

As announced in a previous post, the aerosol definition of the new 48r1 release of the CAMS auxiliary data has changed as compared to the former 47r1. At that time, we recommended to disable the use of CAMS data with MAJA before we adapt the code. Meanwhile, we have also tested the actual impact on […]

20.07.2023

Hesperides, the data garden

=>  Since a few years, my colleagues from THEIA project and from the data campus at CNES, started designing a new processing and distribution center, named Hysope-II. This centre was initially set up for products related to hydrology. It includes a processing center, a catalog, and a distribution center (hydroweb.next). It was developed in the […]

05.07.2023

Hespérides, le jardin des données

 => Depuis quelques années, mes collègues du projet THEIA et du Campus de la Donnée au CNES, ont entrepris la conception d’un nouveau centre de traitement et de distribution des données liées à l’hydrologie, appelé Hysope-II. Ce centre était initialement destiné à produire et distribuer les données spatiales utiles à l’hydrologie. Il inclut un centre […]

MAJA and the new CAMS aerosols 48r1

The Copernicus Atmospheric Monitoring Service (CAMS) is about to release a new version of its aerosol products on 27 June 2023, referred as 48r1. Their evolution has a direct impact on MAJA, and requires us to adapt the processor. MAJA will not be ready to support 48r1 before the next MAJA release scheduled for September […]

22.06.2023

Reappearance of the Dnieper river after the destruction of Kakhovka dam

The Kakhovka Reservoir was created in 1956. As the level of the reservoir drops at a staggering rate of two meters per day, it is now possible to see the ancient river reappear in satellite images. I have georeferenced a 1943 German military map published by Defense Express in their article « 1943 Maps Show What […]

19.06.2023

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